98 SCIENCE IN THE UNITED STATES. 
time the altitude of the central peaks, and the consequent coldness 
around their bases (snow falling on them as late as the middle of 
May some years), prevent the growth of the more southern group 
of trees and plants, which might find the moisture sufficient, above 
one thousand feet. 
This is shown by the fact that in two isolated localities not far 
from this range, but in the low country, are small groves of trees — 
probably belonging properly to the Sylva of the warmer high 
mountains of lower California. One of these is Pinus Torreyand, 
growing scantily on the sandstone bluffs near the mouth of Soledad 
creek, nine miles north of S. Diego Bay, and three hundred and fifty 
feet above the sea. The other is Quercus oblongifolia, found near 
the head of San Luis Rey river, sixteen miles north of Santa 
Isabel valley, and about one hundred and fifty feet altitude. * Be 
sides these we miss on this range many northern trees found on 
the San Bernardino Range (eleven thousand six hundred feet high, 
by Mr. Goodyear’s measurement). Of these I have noted the far- 
spread red fir (Tsuga Douglasii) and walnut (Juglans rupestris 
Englm.). The nut pine (P. monophyllus Torr.), and juniper (J. — 
occidentalis Nutt.), of the great arid basin east of the mountains, 
very probably grow scantily lower down the eastern slope of this 
range, 
SCIENCE IN THE UNITED STATES. 
FROM THE FRENCH OF ALPHONSE DE CANDOLLE. 
- [Tue following extract is taken from a recent publication 
titled “ Histoire des Sciences et des Savants depuis deux siècli 
— a very curious and instructive work, in which the lists of 
eign associates and correspondents of the three leading scientific 
academies (those of Paris, London and Berlin) have b 
upon the United States, contained in a detailed “ examination 
different countries viewed with regard to the causes of their 
fluence on the sciences.” It is difficult fully to appresi 
*I am inclined to Believe thie to be oniy a very ean e T 
‘bet hewe mot boha the ac 
